Electric fitting.



J. CUTHBERT.

ELECTRIC FITTING.

APPLICATION FILED JULY 26.1915.

1 20,608. Patented Mar. 27, 1917.

WZZwCB/Q w, JW

JOHN CUTHBERT, OF CHICAGO, ILLINOIS.

ELECTRIC FITTING.

Application filed July 26, 1915.

To aZZ 207mm it may concern:

Be it known that I, JOHN CUTHBERT, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Electric Fittings, ofwhich the following is a specification.

My invention relates to improvements in electrical fittings and hasespecial reference to receptacles for current conducting devices, suchas plural fuse plugs, two wire extension cut outs branching from a threewire-circuit system.

One of the objects of my invention is to generally improve electricwiring fittings, of the class described, to cheapen the cost of theirproduction; to increase the convenience of their installation, andrender the parts and connections more accessible.

Other and further objects of my invention will become readily apparent,to persons skilled in the art, from a consideration of the followingdescription when taken in conjunction with the drawings, wherein l igure1 is a plan view of a fitting embodying my invention.

Fig. 2 is a section taken on line 22 of F 3 is a section taken on lineof F 1.

Fig. 4} 1s a section taken on line 44t of Fig. 1.

Fig. 5 is a perspective view of a shell c0n nector, and neutral wireclamp l or connecting the screw shells of the two it'use plugreceptacles to the neutral wire of a three wire system.

Fig. 6 is a similar view of a shell connector and positive or negativewire clamp for connecting the screw shells of one fuse plug receptacleto the positive or negative wire. One of these connectors is used toconnect a receptacle to each of the outer or full potential wires.

In all the views the same reference char actors are employed to indicatesimilar parts.

In the selected embodiment of my invention 10 is a generally rectangularblock or insulating material, such as porcelain, or the like, providedwith shell receiving depressions or cavities 11 and three transverselyextending grooves 12, 13 and 141-, to provide spaces within which toreceive and secure the mains or branch means of a threewire system.

In each of the depressions 11 there is com Specification of LettersPatent.

Patented Mar. 27, 1917. Serial No. 4132?.

tained conducting parts, constituting receptacles, for electricalcurrent conducting devices, such as iuse plugs, lamps or the like; thereis a central perforation 15, within which to contain the central contactof the receptacle. The perforation 15 terminates in counter-sunkscrcw-receiving depressions 16 for screws, to hold the center contact inplace.

The block is supported on four integral legs 17, 1H. 19 and 20 toincrease the insulating qualities oil; the block and to provide wirecontaining space thereunder. These legs are longitudinally ierioratcd,as at 21. to receive screws :l'or attaching the device to a suitablesupport. The legs 18 and 2e are in line with and below the groove lihoneach side o-l the longitudinal axis of the block. The legs 17 and 19 arecentrally disposed or subslhntially in a plane with the longitudinal'axis oi the device and extend a little into the vertical planecontaining the grooves 12 and 11-. The perforations through the legs arecountersunk, in each instance. as at to provide receptacles for theheads ol the attaching screws so as to remove them below contact withany of the metal portionsthat are contained upon the face of thefiXturel iXn ,over-hanging ledge Q-Q4 extends transvershly of thefixture on each side and under this ledge are pockets and 26 into whichto insert the conducting wires, as 27. There is a slot 28, in eachinstance, made through the structure and which connects the pockets and26, as the case may be. with the respective depression 11. between theinner and outer contact to be inserted therein. as clearly shown in Fig..lnto the pockets. 25 and 26, and through the slots 98, the conductingwire is inserted for connection with the combined binding screw andcentral contact 2.).

There is a rim 30 around each of the depressions 11 which is cut away,as at 31, to permit the insertion of a downturned portion 32-32 of theshell connectors 33-33. The eoinicctm is connected to the shell 34 asclearly shown in Fig. 4-. A wire engaging elip 35, overlies a part ofthe connector, and clamped thereto by means of a clamping screw 36. Theconnector 33 is preferably joined to the shell 34-, by means of a hollowrivet 37. A double connector 31) joins two shells, one on. each side ofthe roove 13, the clip 35 is desi ned to con- Wire, of the three Wiresysls, lhe central contact Hill said wires by a means and .oe hereaftermore fully des 3', which there is adapt d to connect .cle with thepositive Wires, respectively, ."1 the grooves 12 and contact connection29 forms or nay Patent No. 1,166,1lel, Quill i915, tilled aune 19th,

is specifically claimed.

'icle connector in this centrally pert! screw 29, at t w. h overl.Underlying Washer 43 havunturned and adapted to around the shank of theinserted through the storing notch 40 in the thus combining a Wirecentral contact member 11 one structure,

of the receptacle l L the depression 11, and v i slotted washer 45,material, cut away as at 46, man in Fi 'l, and overlying base flange 4-7of the .nd the connectors lace the sleeve 3'? cut away portion shoulder4:94 and the slot sitioi'i, The Wire its wire turning inside of theupper e 3*? and the parts grooves 5252 and 52 in. hich register with thegrooves 12, in face of the block. /Vl1en e bloi a e placed edge to ed ed constitute su through which a the space problock. can he entirely concfront oi? th shells are to he inn" devices and having three grooves in.

the two projecting ledges and also within the spaces betv son the legsand under the four fuse receptacles,

Another advantage presented by the use of my block is in sub-main WiringWhere an 1 assembled. group of cut-outs are used and it is desired towire up the mains of one, two or more cut-outs independently of the general inains. It can be accomplished in my improved structure byutilizing the vertical grooves in the ends of the block, whichregistering with adjacent blocks provides circular openings throughwhich Wires may be passed "from below the "under surface 01" the bolclrsto the proper connections thercabove. This feature of my invention permits substantial contact oi? adjacent JlOC-llq, Without the necessity ofspacing thei n span to provide space within which .Vll'QS" placed, as inthe usual form of structures.

in any structure these openin a "e a present and if perchance the Worlshould subsequently find it desirable place wires between adjacentblocks it would not be necessary'to dismount the entire number of blocksin order to provide such space as in former fittings and the trouble andexpense necessitated by re-loeating the blocks, after such space hasbeen of as in the expcnsivedrilling and tapping required by suchreorganization, is avoided.

A further advantage is presented in the use of my blocks wherein twoparallel rows of such 'hl cks may be placed with their endssubstantially in contact, the outside bound ary Walls of the grooves 12and 14 serving, as sullicient separation for the potentiated clampingmembers.

Another feature that will be appreciated by the employment of suchdevices is the fact that its dimensions are smaller than blocks usuallyfound upon the market, With.- out sacrificing insulating separation.

Attention is called to they features of my improved device not forlaudatory purposes but to more clearly differentiate it from bodiment ofmy invention for the purpose of clear disclosure, it is evident thatchanges may be made in the disposition, arrangement and configuration ofthe parts Within the scope of the appended claims.

Having described my invention, What ll claim is:

1. A circuit connecting fitting comprising a block of insulatingmaterial having" a plurality of depressions in its face, an equal numberon each side of its median plane, for containing receptacles for currentconduct face to cive Wires, one groove in. th

lilObl piano between a pair cl: depressions and one groove outsideofsaid depressions on each side of said-block.

2. A circuit connecting fitting comprising a block of insulatingmaterial having four depressions in its face, two on each side of itsmedian line for containing receptacles for current conducting devicesand having three grooves in its face to receive wires, one groove in themedian plane between pairs of depressions and one groove beyond eachpair of depressions. i i

3. A support for a circuit connecting fitting comprising a block ofinsulating material having a depression in its face within which tocontain receptacle connecting con ductorsfor a current conducting deviceto be inserted therein and having a wire receiving groove in its faceand a perforation under said groove through which to insert a wire intosaid depression.

4. A circuit connecting fitting comprising a block of insulatingmaterial having four depressions in its face, two on each'side of itsmedian line for containing receptacles for current conducting devicesand having three grooves in its face to receive wires, one groove in themedian plane between pairs of depressions and one groove beyond eachpair of depressions and vertical grooves in its edges registering withthe face grooves said block having legs whereupon to support the fittingto provide wire space therebelow.

A circuit connecting fitting comprising a block of insulating materialhaving four receptacles in its face for current conducting devices, andhaving three grooves in its face to receive wires, one groove in the.median plane between pairs of receptacles and one groove beyond eachpair of receptacles and grooves in its edges registering withthe facegrooves and a wire clamping clip in the central face groove connectingreceptacles on each side thereof and a clamping clip in each of the sidegrooves connected to the other recoptacles, respectively, and a wireclamping binding screw in the center of each receptacle.

6. A support for a circuit connecting fitting, comprising a block ofinsulating material having two parallels ire receiving grooves and aseries of alining depressions between the grooves in its face, withinwhich depressions to contain conducting parts of receptacles for currentconducting devices, said block being perforated under the sidegrooveswithin which perforations to insert wires into said depression. 7

7. A circuit connecting fitting-comprising a block of insulatingmaterial having a group of depressions in its face; a group ofreceptacles, for current conducting devices,

walls thereof, whereby to connect said Wires with selected receptacles.

8. An insulating block for electric fittings comprising a substantiallyrectangular body having receptacle receiving depressions in its face andhaving pockets in its edges with openings connecting said/pockets withsaid depressions and grooves in its face near each end leaving unbrokenouter walls, said grooves located aboversaid pockets.

9. An insulating support for a circuit connecting fitting comprising asubstantially rectangular block of insulating material having adepression in its face "within Which tocontain conducting parts, forconnection with a current conducting device to beinserted therein, andhaving grooves in its face within which to receive wires and having alaterally extending aperture opening in the floor of said depression,through hich to insert a branch wire for connection to saidcurrent-conducting parts.

.10. As an article of manufacture, an insulating support for areceptacle, comprising a substantially rectangular block of insulatingmaterial having a depression in its face, and a groove in its face toreceive a wire, and a later-all" extending perforation under saidgroove, tnrough which to insert a wire into said depression.

In testimony whereof I hereunto set my so f hand in the presence of twosubscribing Wit- Fonr'in BAIN, MARY F. ALLEN.

